Jerry is experiencing hallucinations. he hears voices telling him which people to avoid because they are out to get him. he believes that he is a wealthy heir related to the trump family. he avoids his actual family and exhibits confusion and fear. jerry is most likely experiencing schizophrenia.

jerry is most likely experiencing paranoid schizophrenia.
People with paranoid schizophrenia tend to lost groip about their reality. It make them experience constant fear in their own mind that actually not exists.
This form of illness is considered as a chronic disorder that make the people who have it unable to function properly in society.

It's most likely choice a, it makes the most sense in my opinion.